Honestly, all in all, is what I've been saying for months.
D800 has always been a far better camera than the 5D3, which has always been ridiculously overpriced. Nikon could tune down some key features and realize a still very attractive camera at an attractive price point - considering it will only go down in a few months.
The 5D3 was already at the beginning a 5D2.5; it was impossible to tune it down while keeping it attractive. The best thing for Canon would have been to price the 5D3 between the D600 and the D800, basically competing with both of them.
I pity the people who will waste their money on this 6D, it's not worth more than 1200$. No one interested in this sort of camera has a +5000$ lens collection, so switching to Nikon will not be painful.
Sad but true. IMO, the only way can could compete with what Nikon has at the moment is to put the 5DIII at 2500 dollars and the 6D and 1500 dollars. Then I would have preordered a 5DIII when it was announced.
At this point, I won't be purchasing another Canon body except for possibly a used 5DIII in a few months... otherwise i'll probably buy the D600 if the reviews are great or the RX1.
I wanted to be a die hard Canon fan, and was for a few years, but if you can't see that they are taking their customers for granted at this point then you're basically blind. This is 2012, i demand innovative, fun, cutting edge products that are competitive in the marketplace and offer upgrades in specs/quality at similar or lower prices.
IMO, this is a downgrade from the 5DII at a price that was higher than Adorama's price for the 5DII over a year ago!!!